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Патент USA US3098492

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July 23, 1963
J. O’SULLlVAN
3,098,482
DISPOSABLE SYRINGE
Filed Jan. '7, 1958
Ti?'déa 503/ 32
Z5
33
7
INIVENTOR.
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ham/Er
time
'atent
United
3,698,482
Patented July 23, 1963
2
1
of a variation in which cover and barrel of the syringe
are made up of separate parts, joined in end to end abut
3,098,482
DISFOSABLE SYRINGE
James O’Sullivan, Adamston, NJ.
Filed Jan. 7, 1958, Ser. No. 707,583
1 Claim. (Cl. 128-220)
ting relation by a surrounding readily removable seal, this
syringe being shown in sealed empty sterile condition.
The invention disclosed herein relates to hypodermic
syringes of the disposable type.
piston forming element and the plunger for operating the
FIGURE 4 is a broken part sectional view of a modi?
cation in which medicament is sealed in the barrel by the
piston has a movement necessary to couple it to the pis
ton, which movement causes the needle to penetrate a
General objects of the invention are to provide a syringe
of this character in a simple, inexpensive form of con
struction, compact in arrangement, small in size, com
wall separating contents from the needle. In this con
struction the cover is shown as an elongated sleeve sealed
at its end to the end ?ange of the barrel.
FIGURE 5 is a broken sectional view illustrating com
plete and ready for use without holders or other acces
sories.
Special objects of the invention are to provide a syringe
pletion of the coupling movement and piercing of the
in a sterile condition having only a single seal which can 15 piston wall.
FIGURE 6 is a side elevation of a ‘form of the invention
be readily broken and which when released will enable the
in which the cover for the needle is engaged and sealed
syringe to be instantly used without further preparation.
over the projecting stem portion of the plunger, this cover
A further important object of the invention is to furnish
appearing in section.
the syringe in a completely sealed one piece container in
the nature of an ampoule which will reach the user in 20
that one piece sealed condition, guaranteeing sterility by
its integral character.
FIGS. 1 and 2 illustrate the one piece container form
of the invention as made up of a single length of uniform
diameter tubing integrally closed at opposite ends at 7
and 8 and having mid length a scored or otherwise easily
Special objects of the invention are to construct the
separable joint 9, de?ning a syringe barrel ll) at one end
syringe so that it may be used ‘for both aspiration and
injection and so small and so furnished with proper ?nger 25 and a cover 11 at the opposite end.
A piston forming plug 12 is con?ned within the barrel
grips that it may be held and operated in the ?ngers of
end and this is provided with a projecting operating stem
one hand.
or plunger 13. While plunger and piston forming ele
Further special objects of the invention are to use but
ments may possibly be made in one piece it is usually
few essential parts and to so construct them that metal
more practical to make these as separate parts, with the
fastenings or the like are not required.
projecting plunger of stiff rigid material and the plug of
Also it is an object of the invention to so construct and
arrange the parts that an ordinary tubular needle may be
resilient material such as soft rubber.
This arrangement makes it possible to provide a con
used, eliminating the need heretofore existing of using
nection between the two by which the plug may be ex
needle hubs and the like.
Special objects further are to so construct the syringe 35 panded to the extent necessary to compensate for slight
variations in size of the barrel.
that only a single closure plug will be necessary and to so
Such a connection is illustrated in FIG. 1 as a taper
design this plug that as a step in the manufacture of the
screw 14 on the inner end of the plunger engaged ina
syringe it may be set to properly ?t the barrel.
correspondingly tapered screw threaded socket 15 in the
Other objects of the invention are to provide a syringe
in a form which may be used in either empty or ?lled 40 plug.
In the course of manufacture, after inserting the plug
condition and which will carry readily readable means
in the tube, when the cover end at 8 is still open, the
for indicating or determining contents of the syringe.
plunger then, in screwing it into the plug, may be turned
A further object of the invention is to provide the
just far enough to expand the plug into ?rm piston ?tting
syringe in a form in which contained medicament will be
closed off from the needle up to the moment it is to be 45 engagement in the barrel.
The needle 1'6 is shown as a plain tubular needle ex
used and then be made accessible by a short movement
of the plunger carrying the needle, to couple the plunger
to the piston and in that act pierce the piston with the
needle.
Other desirable objects attained by the invention and 50
In the drawing accompanying and forming part of the
tion are illustrated.
to a proper extent from the free end of the plunger. This
projecting portion of the needle may be covered by a
removable sheath 17 when the syringe is furnished in the
?lled or loaded condition.
further novel features constituting the invention are set
forth and will appear in the course of the following speci?
cation.
speci?cation several different embodiments of the inven
tending through and affixed in the plunger and projecting
The barrel and the plunger are each constructed for
holding and manipulation by the ?ngers.
In the illustration, the closed flat end 7 of the barrel
55 forms a thumb press and ?nger grip and the projecting
'
The structure, however, may ‘be modi?ed and changed
as regards the immediate illustration, all within the true
intent and scope of the invention as hereinafter de?ned
60
and claimed.
portion of the plunger has parallel annular shoulders
18 and 19 spaced approximately a ?nger width apart to
provide the grip for ?ngers holding and actuating that
part.
Thus in service the closed end of the barrel may be
gripped between thumb and third ?nger while the annular
FIGURE 1 in the drawing is a broken longitudinal
shoulders 18, 19 of the plunger are gripped between ?rst
sectional view of a one piece container form of the syringe
and second ?ngers and the syringe then be held and
in the integrally sealed sterile condition.
operated all by ?ngers of the same hand.
FIGURE 2 is a part sectional collective view showing
The projecting portion of the plunger is shown as
the cover end portion separated from the barrel end por 65
of reduced ‘diameter at 20 between the ?nger grip shoul
tion and the sheath removed from the needle, putting
ders 18, 19 and the body portion of the plunger as of
the syringe in condition for injection of contents.
slightly less diameter than the containing tube so as to
FIGURE 3 is a broken part longitudinal sectional vie-w
3,098,482
‘allow su?icient bending to effect separation of the cover
from the barrel portion of the tube.
This construction enables ready separation of the cover
from the barrel portion of the tube, as shown in FIG. 2,
whereupon after removal of the sheath 17 covering the
needle the syringe is ready ‘for instant use.
The modi?cation shown in FIG. 3 illustrates the fact
that the cover, here designated 1111, may be made as
a separately formed sleeve and be engaged in end to end
relation with the independentlly formed barrel 10a and be 10
sealed and rernovably secured in that relation by a sur
it is onlynecessary to slip this protecting sleeve oif the
plunger to have the syringe in usable condition.
The linger grip ?ange on the projecting portion of the
plunger provides sensual means for judging relative
movement of the piston and barrel and hence aspiring
or injecting action of the syringe.
If desired more than one such indicating ?ange may be
provided on the plunger. Thus in FIGS. 4 and 5 the
plunger is shown as having an inner ?ange or ridge 35
positioned to be enagageable with the open end of the
barrel to act as a stop limiting inward movement of the
rounding r-ing 21 of rubber, tape or other suitable sealing
piston in the barrel. This is a safety precaution prevent
and securing medium.
ing accidental engagement of the inner end of the needle
With this construction it is only necessary to remove
with the closed end wall of the barrel.
or release the seal 21 hermetically securing the cover to 15
The engagement of the open end of the cover with the
the end of the barrel.
projecting ?ange on the closed end of the barrel serves
The closed end 7 of the barrel preferably may be sub
as a stop to prevent engagement of the cover with the
stantialy ?at as shown to serve as a practical thumb press
and ?nger grip.
tipof the needle.
Sealing of the cover to the barrel, as heretofore indi
To further rfaciltate such use the wall forming this closed 20 cated, may be effected in different Ways. Thus with the
elongated form of cover sleeve shown in FIG. 4, a seal
This construction has the advantage of providing a
may be e?ected rby interposing a resilient Washer at the
wider base by which the syringe may be stood upright
abutting end of the cover sleeve and barrel ?ange.
on a table or other support but does add slightly to the
The glazing of the end of the cover sleeve may effect
overall diameter of the syringe, requiring special packing 25 su?icient
?aring and rounding to enable engagement over
attention and the like.
a thin sealing washer or plastic applied to the barrel at
end may be extended as an annular ?ange 22.
The ?at ?nger hold without the laterally extended
?ange, such as shown in FIG. 3, possesses advantages
in that the ?xed diameter can be kept down to that of the
tube, facilitating packing and enabling syringes to be
packed in closer space.
@FIG. 3 is illustrative further of the fact that the syringe
may be sealed in-the sterile empty condition, instead of
the base of the ?nger grip ?ange.
While :each form of the invention has special advan
tages the one piece ampoule container form of syringe
illustrated in FIGS. 1 and 2 has unusual advantages in
that with the cover forming a prolongation of the barrel
it is smaller and all of the same uniform diameter. The
one piece integral construction assures permanent protec
?lled, as ?rst shown.
A scale of graduations or other marks 23 to indi 35 tion. Manufacture of this unit is quite simple, it being
necessary only to use a single length of barrel forming
cate volume or contents may be provided on the plunger
to register with an index on the barrel, such as the end
edge of the barrel. This scale is particularly desirable
tor empty syringes or may, if desired, be used on ?lled
syringes,,such as ?rst shown.
It is considered that the plunger may preferably be
tubing and to head that up at the syringe barrel end, after
which the plunger carrying the needle may be inserted
through ‘the other end, with or without material to be
contained and then the open end closed over the plunger
and needle and the sealed container scored or otherwise
weakened at the line of demarcation between the barrel
and cover forming sections.
made of plastic. With such material it is a simple and
inexpensive matter to impress or otherwise apply desired
The medicament is so thoroughly protected in this in
contents-or "other markings which will be visible usually
through the barrel and cover which in general will be 45 tegral form container that it will last inde?nitely and the
syringe reaches the user ready to use with assurance
made of glass.
of absolute sterility. The needle may be a?ixed in the
In the form of the invention illustrated in FIGS. 4
plunger, particularly when the plunger is made of plas
and 5, the cover there designated 24 is elongated and
tic, by suitable adhesive, cement or snug ?t, or if desired
made of slightly larger diameter to engage ?ully over the
may be molded in place in the plunger. In many cases
barrel and extend into abutting relation with the ?nger
it may be desirable to place a sheath over the end of the
grip ?ange at the closed end of the barrel.
needle, particularly when the syringe is furnished pre
In this relation it may be sealed as with a metal
?lled, as in the illustration, FIG. 1.
or plastic or by a tear seal, such as indicated at 25, sur
I claim:
rounding and tying the bead26 at the end of the cover
An empty sterilized completely sealed ready to use dis
sleeve to the companion bead or ?ange 221: on the bar 55 posable syringe comprising a transparent syringe barrel
rel 1.011.
having a closed end provided with an annularly project
ing ?nger grip forming ?ange and open at the opposite
These views, FIGS. 4 and 5, illustrate the feature
of sealing the medicament or other content 27 in the bar
end, a piston operable in said barrel, an operating plunger
rel by the piston plug 28 and breaking this seal only when 60 connected with said piston and projecting from the open
the plunger'29'is forced inward to effect an operating con
end of the barrel, said plunger being of plastic material
nection of the plunger with the plug.
and carrying graduations on that portion of the same
Speci?cally, the plunger isshown as having an under
within the barrel and visible through the transparent bar
cut head 30' at the inner end of the same adapted to
rel, a tubular needle carried by said plunger, said needle
be sprungv into a correspondingly shaped socket 31 in 65 extending from the piston through the plunger and pro
the piston, and the inner end of the needle is shown as
jecting beyond the end of the plunger, the projecting por
disposed to pierce a partition wall 32in the piston when
tion of said plunger having a ?ange engageable with the
the coupling between plunger and piston is completed, the
open end of the barrel to close the open end of the barrel
and limit inward movement of the plunger in the barrel,
6 illustrates a modi?cation of the cover construc 70 a second ?ange on the projecting portion of the plunger
tion, embodying a short cover sleeve 33, possibly of rub
spaced a‘ distance from the ?rst mentioned ?ange and
ber or plastic, shaped to ?t or 'su?‘iciently elastic to be
the plunger between said ?anges being of reduced diam
?tted in sealing engagement over the tapered stem ex
eter for admitting ?ngers for operating the syringe between
tension 34 of the projecting end of the plunger. This
said ?anges, a cover over the projecting portion of the
has advantages of simplicity and lowcost and means that 75 needle, said cover being readily removable toexpose the
latter‘result indicated in FIG. 5;
3,098,482
needle and permit free operation of the syringe by said
?nger grip forming ?anges on the ‘barrel and the plunger
and readily releasable sealing means removably securing
said cover in said protective position over the needle.
References Cited in the ?le of this patent
6
2,490,553
2,495,025
2,497,562
2,539,510
2,578,812
2,8643 64
UNITED STATES PATENTS
977,952
1,503,220
2,254,449
Heilmann et a1. ________ __ Dec. 6, 1910
Wedig _______________ __ July 29, 1924
Rasmussen ___________ __ Sept. 2, 1941 10
Smith ________________ __ Dec. 6,
Smith _______________ __ Jan. 17,
Smith _______________ __ Feb. 14,
Friden ______________ __ Jan. 30,
Kollsman ____________ __ Dec. 18,
Mizzy _______________ __ Dec. 16,
1949
1950
1950
1951
1951
1958
FOREIGN PATENTS
721,375
310,672
Great Britain _____- ____ __ Jan. 5, 1955
Italy ________________ _._ Aug. 31, 1933
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